Regarding your inquiry about the applicability of Bellhammer Diesel to marine Volvo engines, Bellhammer Diesel is an engine oil additive for diesel engines in general, and is used in many diesel engines, both land-based and marine.
This product forms a strong lubricating film on metal surfaces to
Inhibits wear inside the engine
Reduction of vibration and noise
Improvement of starting performance
Extension of engine life
Improvement of fuel consumption
and fuel economy.
The standard amount to be added is about 5-10% of the total amount of oil.
Even if the engine oil is designated as “low SAPS standard (oil with low content of sulfuric acid ash, phosphorus, and sulfur),” it is designed to be used without significantly impairing the SAPS balance if only about 5% is added.